Combination clay-mill



Patented Apr. 11, 1893.

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O; W. VAUGHN. COMBINATION CLAY MILL.

(No Model.)

Fig l THE NORRIS PETERS C0. FNDY 2 Sheets-Sheet 2.

O. W. VAUGHN. COMBINATION GL-AY MILL.

(No Model.)

Patented Apr; 11

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UNITED STATES PATENT OFFICE.

CALVIN W. VAUGHN, OF CUYAHOGA FALLS, OHIO.

COMBINATION CLAY-MILL.

SPECIFICATION forming part of Letters Patent No. 495,235, dated April11, 1893.

Application filed January 3. 1893. SerialNo. 457.099- (No model.)

To all whom it may concern;

Be it known that I, CALVIN W. VAUGHN, a citizen of the United States,residing at Guyahoga Falls, in the county of Summit and State of Ohio,have invented a certain new and useful Improvement in CombinationClay-Mills, of which the following is a specification.

My invention has relation to improvements in that class of clay mills inwhich verticallyrevolving wheels travel in an annular bed, across whichthey are arranged to reciprocally move.

Heretofore it has been customary in mills of this class, to have theannular bed stationary, and the clay, after being ground, and the millstopped, is removed by hand labor by workmen who enter the bed andshovel it out. This is objectionable for two reasons; First, because ofthe time required, and the expense incident thereto; and, second,because of the liability to injury to those engaged in removing theclay, from some additional starting of the grinding mechanism.

The object of my invention is, by a combination of parts,to produce anew and improved mill, in which the clay may be thoroughly ground andtempered, and from which it may belremoved by the operation of a part ofthe mi 1.

My invention, intended to overcome the above objections, consists in thepeculiar and novel construction, arrangement and combination of partshereinafter described and then specifically pointed out in the claim,reference being bad to the accompanying drawings, forming a part of thisspecification.

In the accompanying drawings, in which simllar reference-numeralsindicate like parts in the different figures: Figure 1, is a verticalcentral section of my improved clay mill ,Fig. 2, a plan of the machinebelow the bed; and Figs. 3, and 4, end and side elevations, (enlarged,)respectively, of the rollers that support the annular bed.

Referring to the drawings, 1 is the annular bed, which consists of adisk 2, of cast iron and braced by radial webs on its under side, onwhich are mounted two concentric rims 3,- 4, between which isinterposed-a false bottom 5, for the grinding wheels to run on. Aboutthe under face of the disk 2, and near its outer edge is an annulartrack 8, which rests and runs on rollers 9, journaled in suitablebearings, attached to the framework of the mill. These rollers supportthe bed, and are in form of truncated cones, their journals running inroller bearings (see Fig. 3), and the track 8, and rollers are beveledto conform to each other. In the center of the disk 2, is a hub, inwhich is fastened a depending shaft 6, the lower end of which runsfreely in a box 7, mounted in the framework of the mill, the office ofwhich box is to hold the lower end of the shaft centrally and preventlateral movement.

Below the bed 1, on the shaft 6, is mounted and keyed a bevel gear wheel10, which meshes in a smaller bevel gear 11, loosely mounted on ahorizontal shaft 12. This bevel gear 11, extends backward, the rearportion constituting one member of the clutch, the other member 11',being fastened with a feather key to the shaft 12, and so arranged as toslide forward and,interlocking with the forward member, turn the wheel,and by it the wheel 10, and bed 1.

For the purpose of illustrating my invention, in so far as it relates togrinding wheels being driven around said bed, and their reciprocalmovement across it, I have adopted the invention of W. G. Merrill, forwhich Letters Patent No. 218,760, were granted August 19, 1879, and towhich patentreference is hereby made for details of construction notherein described.

In the center ofthe bed 1, is an upwardopeuing hub, in which rests thelower end of a shaft 13, its upper end being journaled in a suitablebearing 14, in the framework 15. The shaft 13, has an intermediatechamber or recess, above which it is tubular, and on the tubular part ismounted and fastened a spur wheel 16, which meshes in a smaller gearwheel 17, connected with one member of a clutch 18, loosely mounted onavertical shaft 19, the other member, 20, of said clutch, being keyed tosaid shaft. A horizontal shaft 21, passes through the chamber in theshaft 13, and on it are loosely mounted grindingwheels 22, havinggrooved hubs, which run in boxes in a frame 23, which frame serves tounite them and cause them to move in unison lengthwise of the shaft 21,and surrounds the shaft 13. Attached to the frame 23, is a cast ICQ ing24, preferably for strength constructed in triangular shape, and havinga vertical slot in which a wrist-pin 25, slides. The wristpin 25, isattached to a gear wheel 26, journaled in the chamber of the shaft 13,and moved by a pinion 27, operated by bevel gears 28, 29; thelatter-being mounted on a shaft 30, which extends through the tubularpart of the shaft 13, and is held against turning by a lock 31, attachedto the framework.

I have adopted for the purpose of-illustrating the clutches, a devicecommonly known as the pan clutch, but I do not intend thereby to limitmy invention to that or any other particular form of clutch, as anydevice that will subserve the purpose may be employed; nor do I intend,by the use of the Merrill mill hereinbefore mentioned, to prescribe thatparticular mechanism for operating and reciprocating the grindingwheels, as other mechanism effecting the same movements may be adopted.

The operation of my improved mill is as follows: The clutch whichoperates the motion of the bed is thrown out of gear; and the oneoperating the driving wheels thrown in gear, thereby causing said wheelsto run in the bed and grind the material therein. When the clay has beenground, the wheels are stopped and the bed put in motion and a shovel32, suspended by a flexible connection to the framework of the mill,(this part being only suggested in the drawings,) lowered into therevolving bed, with its edge opposite the motion of said bed, Where itencounters the ground clay, which, by its momentum and the pressure ofthat behind it passes up the shovel blade, and falls over the outside ofthe outer rim.

I make no claim to the shovel used in connection with the revolving bed,as I have already claimed the same in my application filed August 20,1892, Serial No. 443,657, now pending in the Patent Office.

It has not been deemed necessary to show mechanism for actuating theclutches, as this is unimportant to my invention.

I am aware that the revolving bed is, of itself, not new, nor do Ibroadly claim it; but

hat I claim, and desire to secure by Letters Patent, is:

An improved clay mill embodying an annular bed, arranged to be revolved;vertically revolving wheels arranged to be driven around said bed, andto reciprocate across it, and mechanism, such substantially asdescribed, for separately operating said bed and wheels, substantiallyas shown and described.

In testimony that I claim the above I hereunto set my hand.

CALVIN W. VAUGHN.

In presence of C. E. HUMPHREY, O. P. HUMPHREY.

